Building a CLI Tool in Rust

Rust is quietly becoming the language of choice for command-line tools. Its combination of performance, safety, and excellent error handling makes it ideal for tools that need to be fast, reliable, and user-friendly. Tools like ripgrep, bat, exa, and fd have proven that Rust CLIs can be both powerful and delightful to use.

In this tutorial, I will walk you through building a simple CLI tool using clap for argument parsing and colored output for terminal formatting. By the end, you will have a working tool and a template for building more.

The Rust ecosystem for CLI development is remarkably mature. Between clap, serde for configuration, and crossterm for terminal manipulation, you have everything you need to build professional-grade tools.